# Copyright 2022 Huawei Technologies Co., Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============================================================================

"""file endings"""

from batchgenerators.utilities.file_and_folder_operations import subfiles, os


def remove_trailing_slash(filename: str):
    """remove trailing slash"""
    while filename.endswith('/'):
        filename = filename[:-1]
    return filename


def maybe_add_0000_to_all_niigz(folder):
    """maybe_add_0000_to_all_niigz"""
    nii_gz = subfiles(folder, suffix='.nii.gz')
    for n in nii_gz:
        n = remove_trailing_slash(n)
        if not n.endswith('_0000.nii.gz'):
            os.rename(n, n[:-7] + '_0000.nii.gz')
